Gravel pile making method based on ground disturbance linkage monitoring

By using acceleration sensors to monitor formation disturbances during pile making and adjusting the vibration retention setting value according to the monitoring data, the problems of excessive strata disturbances and poor encryption are solved, and the stability and encryption of formations are improved.

CN119162991BActive Publication Date: 2025-03-21BEIJING VIBROFLOTATION ENG +1
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202411587765.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-08
Publication Date
2025-03-21
Estimated Expiration
2044-11-08

AI Technical Summary

Technical Problem

During pile making, the looseness of the formation leads to excessive impact on the formation disturbance of the fifth layer under the same vibration retention setting value, which may lead to strata deviation, and the use of a fixed large vibration retention depth may affect the strata encryption.

Method used

Acceleration sensors are used to monitor the impact of vibration of the vibrator on the formation, set high damage thresholds and low damage thresholds according to the average value of the monitored amplitude value, and adjust the vibration retention setting value in time to ensure that the impact of disturbance of the vibrator on the formation is within a controllable range.

Benefits of technology

By real-time monitoring and adjusting the vibration retention setting value, the formation offset is avoided, and the formation is encrypted, which improves the stability and effect of the pile making process.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119162991B_ABST
    Figure CN119162991B_ABST
Patent Text Reader

Abstract

The present invention provides a gravel pile making method based on stratum disturbance linkage monitoring, which relates to the technical field of pile making. The invention mainly adopts an acceleration sensor inserted into the stratum surface, and the position of the acceleration sensor is located on the measuring line connecting the centers of the formed pile and the hole to be formed, and is close to the formed pile, so that the disturbance effect of the vibration of the vibrator on the stratum during each reverse insertion and descent process can be monitored by the acceleration sensor, thereby, the current vibration retention setting value or the next vibration retention setting value can be adaptively changed to ensure that the disturbance effect of the vibrator on the stratum is within a controllable range, so that the stratum does not deviate, and the stratum density can be better.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to the technical field of pile making, and in particular to a gravel pile making method based on stratum disturbance linkage monitoring. Background Art

[0002] The pile making process is mainly divided into filling and retaining vibration. During the pile making process, a retaining vibration setting value is usually determined in advance, so that the vibrator performs a reverse insertion and descending to the pile hole with a retaining vibration setting value as a constraint condition. The retaining vibration setting value includes the retaining vibration depth, the retaining vibration time, and the retaining vibration current. When the vibrator is reversed and descends to the current retaining vibration depth, a crushed stone filling operation is performed with a single crushed stone addition amount, and then the vibrator is started to retain vibration with the current retaining vibration time. During the retaining vibration process, the vibrator will vibrate the formation, causing disturbance of the formation. When the vibration is too large, the disturbance effect on the formation is greater, resulting in greater displacement of the formation.

[0003] However, since the stratum of the fifth layer is looser than that of the fourth layer, when determining the vibration retention setting value, if the vibration retention depth of the fifth layer adopts the same vibration retention depth as that of the fourth layer, the disturbance impact on the fifth layer will be too large under the same vibration retention setting value, causing the fifth layer to shift. At present, to address this problem, the vibration retention depth of the fifth layer is usually thickened, so that the vibrator fills and vibrates in the fifth layer based on a larger vibration retention depth. However, the strata themselves are different. If a larger vibration retention depth is used throughout the fifth layer, the gravel piles formed at a certain vibration retention depth may not have good density for the strata. Summary of the invention

[0004] The purpose of the present invention is to provide a gravel pile making method based on linkage monitoring of stratum disturbance, which mainly adopts an acceleration sensor inserted into the stratum surface. The acceleration sensor is located on the measuring line connecting the centers of the formed pile and the hole to be formed, and is close to the formed pile, so that the acceleration sensor can monitor the disturbance effect of the vibration of the vibrator on the stratum during each reverse insertion and descent process. Therefore, the current vibration retention setting value or the next vibration retention setting value can be adaptively changed to ensure that the disturbance effect of the vibrator on the stratum is within a controllable range, so that the stratum does not deviate, and the stratum density is better.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions:

[0006] A gravel pile making method based on ground disturbance linkage monitoring includes a pile and a hole to be piled, an acceleration sensor is set on a measuring line connecting the centers of the two circles, and the acceleration sensor is located at a distance of A meters from the pile; the gravel pile making method includes the following steps:

[0007] S1: When the vibrator is reversely inserted into the pile hole to be formed and descends to the current vibration retention depth, the winch stops and enters the current vibration retention state. The current vibration retention state is that the vibrator reversely inserts and descends the pile hole to be formed once with the current vibration retention setting value as a constraint condition. The current vibration retention setting value includes the current vibration retention depth and the current vibration retention time.

[0008] S2: In the current vibration retention state, check whether the current vibration retention depth is higher than the final hole vibration retention depth. If so, end the pile making. If not, go to step S3;

[0009] S3: Obtain the amplitude value of the acceleration sensor in the previous n seconds within the current vibration retention time, and determine whether the average value of the amplitude value exceeds the high damage threshold. If so, terminate the current vibration retention state, control the winch to lift, and update the current vibration retention setting value according to the temporary lifting depth of the lifting. If not, go to step S4;

[0010] S4: Acquire the amplitude values ​​of all acceleration sensors within the current vibration retention time, and update the next vibration retention setting value according to whether the average amplitude value exceeds the low damage threshold.

[0011] Furthermore, in S3, the process of updating the current vibration retention setting value according to the temporary lifting depth is specifically as follows:

[0012] When the winch is lifted to a temporary lifting depth, a crushed stone filling operation is performed on the pile hole to be completed with an incremental amount of crushed stone added. At the same time, the current vibration retention depth is updated. The updated current vibration retention depth = current vibration retention depth + incremental depth.

[0013] Furthermore, the S4 specifically includes the following steps:

[0014] S41: Obtain the amplitude values ​​of all acceleration sensors within the current vibration retention time, and determine whether the average amplitude value exceeds the low damage threshold. If not, go to step S42; if yes, go to step S43;

[0015] S42: Keep the current vibration retention setting value, and use the current vibration retention setting value as the next vibration retention setting value;

[0016] S43: Update the next vibration retention setting value according to the current vibration retention setting value.

[0017] Further, in S42, the process of using the current vibration retention setting value as the next vibration retention setting value is specifically as follows:

[0018] Set the next vibration retention time = current vibration retention time, set the next vibration retention depth = current vibration retention depth, set the next single gravel addition amount = current single gravel addition amount.

[0019] Further, in S43, the process of updating the next vibration retention setting value according to the current vibration retention setting value is specifically as follows:

[0020] Set the next vibration retention time = current vibration retention time - one incremental time, set the next vibration retention depth = current vibration retention depth + one incremental depth, set the next single gravel addition amount = current single gravel addition amount + one incremental gravel addition amount.

[0021] Furthermore, the vibration retention setting value also includes a vibration retention current, and the vibration retention current is a preset fixed value.

[0022] Furthermore, in S2, it is detected whether the current vibration depth is higher than the final hole vibration depth. If not, it is detected whether the current vibration depth is higher than the boundary depth between the fifth layer and the fourth layer of the formation. When the current vibration depth is higher than the boundary depth between the fifth layer and the fourth layer of the formation, go to step S3.

[0023] Furthermore, the fifth layer and the fourth layer are both stratigraphic numbers. The fifth layer refers to the modern eroded sand and gravel layer al+plQ42; the fourth layer refers to the fine-grained soil layer IQ41 of the barrier lake phase deposits.

[0024] Beneficial effects of the present invention:

[0025] The present invention provides a gravel pile making method based on stratum disturbance linkage monitoring. The method mainly adopts an acceleration sensor inserted into the stratum surface. The acceleration sensor is located on the measuring line connecting the centers of the formed pile and the hole to be formed and is close to the formed pile. The amplitude value of the stratum disturbance can be monitored by the acceleration sensor. Based on the change of the amplitude value, a highest high damage threshold and a lowest low damage threshold can be preset in advance. According to the high damage threshold and the low damage threshold, the current vibration retention setting value or the next vibration retention setting value is adaptively changed to ensure that the disturbance effect of the vibrator on the stratum is within a controllable range, so that the stratum does not deviate, and the stratum density is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the process of the gravel pile manufacturing method in Example 1 of the present invention;

[0027] Figure 2 It is a schematic flow chart of a method for making gravel piles applied to the fifth floor in Example 1 of the present invention;

[0028] Figure 3 It is a schematic diagram of the fifth layer and the fourth layer respectively using fixed vibration retention depths in the prior art in Example 1 of the present invention;

[0029] Figure 4It is a schematic diagram of the position of the acceleration sensor in Embodiment 1 of the present invention being located on the measuring line connecting the centers of the pile and the hole to be piled;

[0030] Figure 5 is a schematic diagram of the amplitude value monitored by the acceleration sensor in Example 1 of the present invention;

[0031] Figure 6 In Example 1 of the present invention, based on Figure 1 Schematic diagram of the phenomenon that the vibration retention depth shrinks due to the medium gravel pile making method. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0034] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0035] Additionally, descriptions of well-known structures, functions, and configurations may be omitted for clarity and conciseness.One of ordinary skill in the art will recognize that various changes and modifications may be made to the examples described herein without departing from the spirit and scope of the present disclosure.

[0036] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0037] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments:

[0039] Example 1

[0040] The pile making process is mainly divided into filling and retaining vibration. During the pile making process, a retaining vibration setting value is usually determined in advance, so that the vibrator performs a reverse insertion and descending to the pile hole with a retaining vibration setting value as a constraint condition. The retaining vibration setting value includes the retaining vibration depth, the retaining vibration time, and the retaining vibration current. When the vibrator is reversed and descends to the current retaining vibration depth, a crushed stone filling operation is performed with a single crushed stone addition amount, and then the vibrator is started to retain vibration with the current retaining vibration time. During the retaining vibration process, the vibrator will vibrate the formation, causing disturbance of the formation. When the vibration is too large, the disturbance effect on the formation is greater, resulting in greater displacement of the formation.

[0041] However, since the stratum of the fifth layer is looser than that of the fourth layer, when determining the vibration retention setting value, if the vibration retention depth of the fifth layer adopts the same vibration retention depth as that of the fourth layer, the disturbance impact on the fifth layer will be too large under the same vibration retention setting value, causing the fifth layer to shift. At present, to address this problem, the vibration retention depth of the fifth layer is usually thickened, so that the vibrator fills and vibrates in the fifth layer based on a larger vibration retention depth. However, the strata themselves are different. If a larger vibration retention depth is used throughout the fifth layer, the gravel piles formed at a certain vibration retention depth may not have good density for the strata.

[0042] In order to solve the above problems, in this embodiment, a gravel pile making method based on linkage monitoring of stratum disturbance is provided, which mainly adopts an acceleration sensor inserted into the stratum surface. The acceleration sensor is located on the measuring line connecting the centers of the pile and the hole to be piled, and is close to the pile, so that the acceleration sensor can monitor the disturbance effect of the vibration of the vibrator on the stratum during each reverse insertion and descent process, and the disturbance effect of the fifth stratum can be monitored. Therefore, the current vibration retention setting value or the next vibration retention setting value can be adaptively changed to ensure that the disturbance effect of the vibrator on the stratum is within a controllable range, so that the stratum does not deviate, and the stratum density is good.

[0043] Specifically, Figure 1 As shown, a gravel pile making method based on ground disturbance linkage monitoring includes a pile and a hole to be piled, an acceleration sensor is set on the line connecting the centers of the two circles, and the acceleration sensor is located at a distance of A meters from the pile; the gravel pile making method includes the following steps:

[0044] S1: When the vibrator is reversely inserted into the pile hole to be formed and descends to the current vibration retention depth, the winch stops and enters the current vibration retention state. The current vibration retention state is that the vibrator reversely inserts and descends the pile hole to be formed once with the current vibration retention setting value as a constraint condition. The current vibration retention setting value includes the current vibration retention depth and the current vibration retention time.

[0045] S2: In the current vibration retention state, check whether the current vibration retention depth is higher than the final hole vibration retention depth. If so, end the pile making. If not, go to step S3;

[0046] S3: Obtain the amplitude value of the acceleration sensor in the previous n seconds within the current vibration retention time, and determine whether the average value of the amplitude value exceeds the high damage threshold. If so, terminate the current vibration retention state, control the winch to lift, and update the current vibration retention setting value according to the temporary lifting depth of the lifting. If not, go to step S4;

[0047] S4: Acquire the amplitude values ​​of all acceleration sensors within the current vibration retention time, and update the next vibration retention setting value according to whether the average amplitude value exceeds the low damage threshold.

[0048] Preferably, in S3, the process of updating the current vibration retention setting value according to the temporary lifting depth of the lifting is specifically as follows:

[0049] When the winch is lifted to a temporary lifting depth, a crushed stone filling operation is performed on the pile hole to be completed with an incremental amount of crushed stone added. At the same time, the current vibration retention depth is updated. The updated current vibration retention depth = current vibration retention depth + incremental depth.

[0050] Preferably, the S4 specifically includes the following steps:

[0051] S41: Obtain the amplitude values ​​of all acceleration sensors within the current vibration retention time, and determine whether the average amplitude value exceeds the low damage threshold. If not, go to step S42; if yes, go to step S43;

[0052] S42: Keep the current vibration retention setting value, and use the current vibration retention setting value as the next vibration retention setting value;

[0053] S43: Update the next vibration retention setting value according to the current vibration retention setting value.

[0054] Preferably, in S42, the process of using the current vibration retention setting value as the next vibration retention setting value is specifically as follows:

[0055] Set the next vibration retention time = current vibration retention time, set the next vibration retention depth = current vibration retention depth, set the next single gravel addition amount = current single gravel addition amount.

[0056] Preferably, in S43, the process of updating the next vibration retention setting value according to the current vibration retention setting value is specifically as follows:

[0057] Set the next vibration retention time = current vibration retention time - one incremental time, set the next vibration retention depth = current vibration retention depth + one incremental depth, set the next single gravel addition amount = current single gravel addition amount + one incremental gravel addition amount.

[0058] Preferably, the vibration retention setting value also includes a vibration retention current, and the vibration retention current is a preset fixed value.

[0059] Preferably, Figure 2 As shown, in S2, it is detected whether the current vibration depth is higher than the final hole vibration depth. If not, it is detected whether the current vibration depth is higher than the boundary depth between the fifth layer and the fourth layer of the formation. When the current vibration depth is higher than the boundary depth between the fifth layer and the fourth layer of the formation, go to step S3.

[0060] Preferably, the fifth layer and the fourth layer are both stratigraphic numbers, the fifth layer refers to the modern eroded sand and gravel layer al+plQ42; the fourth layer refers to the fine-grained soil layer IQ41 of the barrier lake phase deposits.

[0061] Based on the above principles, the present invention is further described:

[0062] In the process of pile making, the vibrator reverses and descends once in the pile hole to be formed with a set value of retained vibration as a constraint condition, and forms a gravel pile in the pile hole to be formed through multiple reverse descents, so as to improve the density of the stratum through the gravel pile. Specifically, the reverse descent process is as follows: when the vibrator reverses and descends to the current retained vibration depth, a gravel filling operation is performed with a single gravel addition amount, and then the vibrator is started according to the current retained vibration current to retain the current vibration time in the pile hole to be formed. At this time, in the process of retained vibration, the vibrator densifies the stratum by vibrating the gravel. When the vibrator vibrates the gravel, the gravel will also vibrate the stratum on the side, causing disturbance of the stratum. The greater the vibration generated by the vibrator, the greater the disturbance effect on the stratum, resulting in a larger displacement of the stratum, which is not allowed in the pile making process.

[0063] Therefore, in the prior art, the vibration retention depth of the fifth layer is usually thickened. This is because, in a single vibration retention state, as the vibration retention depth increases, the amount of single crushed stone required to be filled in will also increase accordingly, and the crushed stone plays an energy-absorbing role in the vibration retention process. For the vibrator, when there are more crushed stones in the vibration retention depth to absorb the vibration energy, the disturbance effect on the corresponding formation will also be reduced.

[0064] Specifically, for the setting value of vibration retention, the vibration retention depth of the fourth layer is generally 0.3 meters, and the vibration retention depth of the fifth layer is generally 0.7 meters, so that the vibration retention depth of the fifth layer is much greater than that of the fourth layer, which can ensure that when the vibrator is vibrating in the fifth layer, the stratum of the fifth layer will not be greatly disturbed. At this time, since the fifth layer and the fourth layer use fixed vibration retention depths respectively, Figure 3As shown, it can be seen that there is a jump phenomenon in the vibration retention depth from the fifth layer to the fourth layer. In the fifth layer, a larger vibration retention depth is also fixed for pile making. However, the strata themselves are different. If a larger vibration retention depth is used throughout the fifth layer, the gravel piles formed at a certain vibration retention depth may not have good density for the strata.

[0065] Therefore, in order to solve the problem of poor stratum compactness caused by the fixed vibration retention depth in the prior art, the present invention provides a gravel pile making method based on stratum disturbance linkage monitoring, wherein the gravel pile making method mainly inserts an acceleration sensor on the stratum surface, and the acceleration sensor is located on the measuring line connecting the centers of the pile and the hole to be piled, and is close to the pile, such as Figure 4 As shown, the stratum includes piles and holes to be piled. The centers of the piles and the holes to be piled are connected to form a connecting measurement line. The acceleration sensor is set on the connecting measurement line, and the acceleration sensor is 0.5 meters away from the piles. By utilizing the obstruction of the piles, the acceleration energy can be better detected.

[0066] According to the acceleration sensor, the amplitude value of acceleration can be obtained in real time, such as Figure 5 As shown, according to the fluctuation of the amplitude value, the amplitude value obtained in real time by the above-mentioned acceleration sensor is subjected to correlation wave calculation, which can reflect the disturbance effect of the current vibrator on the formation. The correlation wave calculation is a prior art means and will not be described in detail here. Based on the change of the amplitude value of the above-mentioned acceleration sensor, a highest high damage threshold and a lowest low damage threshold can be preset in advance, and the current vibration retention setting value or the next vibration retention setting value can be adaptively changed according to the high damage threshold and the low damage threshold, so as to ensure that the disturbance effect of the vibrator on the formation is within a controllable range, so that the formation does not deviate, and the formation density can be better.

[0067] Specifically, adaptively changing the current vibration retention setting value or the next vibration retention setting value according to the high damage threshold and the low damage threshold includes the following:

[0068] When the average value of the amplitude value in the first n seconds of the current vibration retention time exceeds the high damage threshold, it means that the current vibrator has too much disturbance effect on the formation at the beginning, and the vibration retention state is immediately terminated, that is, in the present invention, an interruption protection program is newly added for the current vibration retention process to prevent the formation from shifting too much;

[0069] When it is monitored that the average value of the amplitude value in the first n seconds of the current vibration retention time does not exceed the high damage threshold, the average value of all amplitude values ​​in the current vibration retention time is monitored. If the average value exceeds the low damage threshold, it means that the current vibrator has a certain disturbance effect on the formation, and the next vibration retention setting value can be updated to prevent the increase of the disturbance effect of the vibrator on the formation in the next vibration retention state, and control it within a controllable range; if the average value does not exceed the threshold, it means that there is no disturbance effect on the formation or a very small disturbance effect is produced, which is within the controllable range, and the current vibration retention setting value can be maintained, that is, the next vibration retention setting value is the current vibration retention setting value, to avoid the vibrator having poor formation density.

[0070] In summary, it can be concluded that, compared with the prior art, the vibration retention depth from the fifth layer to the fourth layer will shrink. Specifically, Figure 6 As shown, when the vibration depth of the fourth layer is set to be fixed at 0.3 meters, when going from the fourth layer to the fifth layer, the vibration depth of the first vibration setting value in the fifth layer is set to 0.3 meters, and the vibration time can be set to 20 seconds. When the vibrator is reversed and dropped to the current vibration depth of 0.3 meters, the winch stops and enters the current vibration state. The current vibration state is: a single amount of crushed stone is added to the pile hole to be formed, and then the vibrator is controlled to vibrate at the current vibration depth for 20 seconds. At this time, the vibration process is monitored by the acceleration sensor. When the amplitude value of the acceleration sensor in the first 5 seconds of the current vibration time is obtained, it can be determined whether the average value of the amplitude value exceeds the high damage threshold. Since the first vibration depth is close to the fourth layer, the average value of the current amplitude value does not exceed the high damage threshold, then the amplitude value of the acceleration sensor for all 20 seconds in the current vibration time is obtained to determine whether the average value of the amplitude value exceeds the high damage threshold. If not, the current vibration setting value can be maintained within the controllable range, and the second vibration depth is set to 0.3, and so on.

[0071] Among them, after obtaining the amplitude value of the acceleration sensor in the first 5 seconds of the current vibration retention time, it is determined that the average value of the amplitude value exceeds the high damage threshold, the vibration retention state is immediately terminated, and after controlling the winch to lift a temporary lifting depth, a crushed stone filling operation is performed on the pile hole to be completed with an incremental crushed stone addition amount. At the same time, the current vibration retention depth is updated, and the updated current vibration retention depth = current vibration retention depth + incremental depth. For example, when the current vibration retention depth is 0.3 meters and the incremental depth is 0.1 meters, the current vibration retention depth is updated to 0.4. Then, when the vibrator is reversed and descends to the current vibration retention depth of 0.4 meters, the winch stops and re-enters the current vibration retention state. The purpose is to use interrupt protection operation to protect the vibrator in the current vibration retention state from causing excessive disturbance to the formation;

[0072] The average value of the amplitude value of the acceleration sensor in the current 5s does not exceed the high damage threshold. The amplitude values ​​of the acceleration sensor for all 20s in the current vibration retention time are obtained, and it is determined that the average value of the amplitude value exceeds the low damage threshold. This indicates that the current vibrator has a certain disturbance effect on the formation. The next vibration retention setting value can be updated, and the next vibration retention time is set to be equal to the current vibration retention time-one incremental time, the next vibration retention depth is set to be equal to the current vibration retention depth + one incremental depth, and the next single crushed stone addition amount is set to be equal to the current single crushed stone addition amount + one incremental crushed stone addition amount. The purpose is to prevent the increase of the disturbance effect of the vibrator on the formation in the next vibration retention state and control it within a controllable range. For example, the current vibration retention depth is 0.3 meters, one incremental depth, and the next vibration retention depth is reset to 0.4 meters, so that the vibrator is lowered and reversed to the next vibration retention depth of 0.4 meters the next time, the winch stops, and enters the next vibration retention state.

[0073] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A method for making gravel piles based on linkage monitoring of stratum disturbance, characterized in that: The method comprises a pile and a hole to be piled, and an acceleration sensor is arranged on a measuring line connecting the centers of the two circles, and the acceleration sensor is located at a distance of A meters from the pile. The method comprises the following steps: S1: When the vibrator is reversely inserted into the pile hole to be formed and descends to the current vibration retention depth, the winch stops and enters the current vibration retention state. The current vibration retention state is that the vibrator reversely inserts and descends the pile hole to be formed once with the current vibration retention setting value as a constraint condition. The current vibration retention setting value includes the current vibration retention depth and the current vibration retention time. S2: In the current vibration retention state, check whether the current vibration retention depth is higher than the final hole vibration retention depth. If so, end the pile making. If not, go to step S3; S3: Obtain the amplitude value of the acceleration sensor in the previous n seconds within the current vibration retention time, and determine whether the average value of the amplitude value exceeds the high damage threshold. If so, terminate the current vibration retention state, control the winch to lift, and update the current vibration retention setting value according to the temporary lifting depth of the lifting. If not, go to step S4; S4: Acquire the amplitude values ​​of all acceleration sensors within the current vibration retention time, and update the next vibration retention setting value according to whether the average amplitude value exceeds the low damage threshold.

2. A method for making gravel piles based on ground disturbance linkage monitoring according to claim 1, characterized in that: In S3, the process of updating the current vibration retention setting value according to the temporary lifting depth of the lifting is specifically as follows: When the winch is lifted to a temporary lifting depth, a crushed stone filling operation is performed on the pile hole to be completed with an incremental amount of crushed stone added. At the same time, the current vibration retention depth is updated. The updated current vibration retention depth = current vibration retention depth + incremental depth.

3. A method for making gravel piles based on ground disturbance linkage monitoring according to claim 1, characterized in that: The S4 specifically includes the following steps: S41: Obtain the amplitude values ​​of all acceleration sensors within the current vibration retention time, and determine whether the average amplitude value exceeds the low damage threshold. If not, go to step S42; if yes, go to step S43; S42: Keep the current vibration retention setting value, and use the current vibration retention setting value as the next vibration retention setting value; S43: Update the next vibration retention setting value according to the current vibration retention setting value.

4. A method for making gravel piles based on ground disturbance linkage monitoring according to claim 3, characterized in that: In S42, the process of using the current vibration retention setting value as the next vibration retention setting value is specifically as follows: Set the next vibration retention time = current vibration retention time, set the next vibration retention depth = current vibration retention depth, set the next single gravel addition amount = current single gravel addition amount.

5. The method for making gravel piles based on ground disturbance linkage monitoring according to claim 3 is characterized in that: In S43, the process of updating the next vibration retention setting value according to the current vibration retention setting value is specifically as follows: Set the next vibration retention time = current vibration retention time - one incremental time, set the next vibration retention depth = current vibration retention depth + one incremental depth, set the next single gravel addition amount = current single gravel addition amount + one incremental gravel addition amount.

6. The method for making gravel piles based on ground disturbance linkage monitoring according to claim 1 is characterized in that: The vibration retention setting value also includes a vibration retention current, and the vibration retention current is a preset fixed value.

7. The method for making gravel piles based on ground disturbance linkage monitoring according to claim 1 is characterized in that: In S2, it is detected whether the current vibration depth is higher than the final hole vibration depth. If not, it is detected whether the current vibration depth is higher than the boundary depth between the fifth layer and the fourth layer of the formation. When the current vibration depth is higher than the boundary depth between the fifth layer and the fourth layer of the formation, go to step S3.

8. A method for making gravel piles based on ground disturbance linkage monitoring according to claim 7, characterized in that: The fifth and fourth layers are both stratigraphic numbers. The fifth layer refers to the modern eroded sand and gravel layer al+plQ42; the fourth layer refers to the fine-grained soil layer IQ41 of the barrier lake phase deposits.

Citation Information

Patent Citations

  • Vibro-replacement stone column densification testing device and intelligent inverse analysis method

    CN113463699A

  • Vibroflotation pile encryption quality intelligent control method and device

    CN114779713A